Eminem $160 million - Marshall Mathers/Eminem sold more albums last decade than any artist in the world, and continues to cash in from his extensive back catalog and occasional tour dates.

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Birdman $160 million - Bryan "Birdman" Williams is the co-founder and chief of Cash Money Records - home to listmates Lil Wayne, Drake and Nicki Minaj. He adds to his coffers with other ventures including clothing and vodka.

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50 Cent ($140 million) -
Though the onetime top Cash King has fallen from his VitaminWater-fueled peak, he still collects cash from sales of his music, as well as G-Unit clothes and video games, SMS headphones and energy shot Street King.

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Lil Wayne $135 million - The diminutive rhymesterâs latest album,Tha Carter IV, sold a million copies in its first week; Lil Wayne also has a clothing line Trukfit and a partnership with Pepsi's Mountain Dew.

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Kanye $120 million â The rapper-producer has had big hits with his Jay-Z collaboration Watch the Throne and his Yeezus tour. He also amid some controversy has been dabbling in shoe design with Nike and his own line of clothing.

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Timbaland $85 million - The portly producer, Timothy "Timbaland" Mosley, makes the Cash Kings list for the sixth year in a row, pulling in proceeds from a lengthy pack catalog, new production credits and liqueur LeSutra.

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Pharrell Williams $80 million - The sweet-singing superproducer continues to earn big, thanks in part to new liqueur line Qream and his Billionaire Boys Club clothing line, which partnered with Rocawear last year.

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Swizz Beatz $65 million -
Though he's still not as well-known as his wife, Alicia Keys, the multifaceted Swizz Beatz has been cashing in on production credits and deals with the likes of Lotus and Reebok which bring him in at number 14.

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Ludacris $65 million - Christopher "Ludacris" Bridges non-musical ventures include Conjure cognac, headphone line Soul, voiceovers for RadioShack and roles in movies such as Fast Five and New Yearâs Eve.

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Nicki Minaj $45 million - Last years Super Bowl and Grammy performances helped Nicki Minaj's profile, while her albums, extensive touring and endorsements with Pepsi, and stint as a judge on American Idol have lined her pocketbook.

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Pitbull $50 million -
The self-proclaimed "Mr. International" has been making money all around the world, pulling in millions from touring, record sales and endorsements with the likes of Kodak and Dr. Pepper.

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Drake $35 million - Aubrey Drake Graham, the former Degrassi starâs sophomore album, moved 631,000 copies in its opening week. This fueled his lucrative Club Paradise Tour. He also shills for Sprite and Kodak.

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Rick Ross â $30 Million - He is the founder of the record label Maybach Music Group and the release of this sixth studio album, "Mastermind", this this year.

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Wiz Khalifa $20 million -
After exploding onto the mainstream, scene in recent years, the Pittsburgh-bred rapper Wiz Khalifa has continued to milk his image as an herbal enthusiast, helping him to healthy merch and album sales.

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Young Jeezy's $15 million - His recent album, Thug Motivation 103: Hustlerz Ambition, has sold more than 500,000 copies since its December release. Jeezy adds to his coffers with touring and a clothing line.

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Akon's $6 million - His latest album is still on hold, but the Senegalese singer continues to collect cash from a range of ventures including touring, production, a record label, a clothing line and a rumored diamond mine in Africa.

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Wale barely missed the Cash Kings list, as did Roc Nation rapper J. Cole, both pulling in close to $6 million on the year. Kid Cudi, Tyga and Lupe Fiasco also had big years, but not enough to crack the top 20.